Addison Strychalsky, 2, of Newtown, Connecticut, pets Libby, a golden retriever therapy dog, during a visit to a memorial for the Sandy Hook Elementary School shooting victims. Twenty children and six adults were shot to death in their elementary school on December 14, 2012, in Newtown. <br />After visits by therapy dogs, parents told stories of children speaking for the first time since the shootings and telling the dogs about what they had experienced.
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